| 摘要 |
PURPOSE: To simultaneously mold a connection hole with a panel-shaped molded item and obtain a concrete mold frame mold capable of ensuring the rigidity of a connection part by providing an auxiliary core for a concrete mold frame connection hole within a main core adjoining the projected peripheral part, and a follower core being movable forward and rearward in the same direction. CONSTITUTION: The auxiliary core 17 disposed in a main core moves forward and rearward normal to a main core by means of ate air cylinder 18, and an annular cutting blade 32 is formed in the tip end of the auxiliary core 17. While, the tip end of the follower cylinder 24 disposed at a location being opposite to the auxiliary core 17 within the projected peripheral part 15 is disposed with a follower core 22. The auxiliary core 17 and follower core 22 act after holding parison P by means of both molds 8a, 8b to allow the main core to advance to the full stroke or forming a recessed part of a panel-shaped molded item, and during continuously forming 3 connection hole, they serve to cut parison P between the cutting blades 32, 34. |
